Re: Billion BiPac 7800N and ADSL 2+

Sometimes ADSL2+ on a very long line can be worse than ADSL1.This is because:The additional higher frequencies used by ADSL2+ degrade more on longer lines so as to become unuseable at the router end of the line.Rather than merely 'disappear' the part of the ADSL2+ signal on these higher frequencies becomes and adds to general noise in the background on the line.Hence the SNRmargin drops and so the net effect is a lowering of the sync speed when the line is run on ADSL2+ compared to ADSL1If the service was restricted to ADSL1 these higher frequencies signal parts would not be present.So longer lines are provisoned on ADSL1 not ADSL2+. I believe the break point is generally regarded as a sync of 4000. Anything more would benefit from 2+ and anything less should be left on 1Usual caveat of course is that each line is different:- you get some long ultra quiet lines and some short but very noisy lines.No idea if PN are prepared to try out ADSL2+ on your line - you can only ask and see what response you get.......................................

Re: Billion BiPac 7800N and ADSL 2+

Plusnet's usual practice is to provision ADSL1 (G.DMT) on 21CN connections where the sync speed is expected to be under 4000kbps because experience shows that is likely to give the most stable service. However that usually goes with an upstream sync speed of 448kbps whereas yours (576kbps) is higher than that.So I wonder if ADSL1 is not forced but results from router/exchange sync negotiation.

Re: Billion BiPac 7800N and ADSL 2+

So I wonder if ADSL1 is not forced but results from router/exchange sync negotiation.

An interesting observation. With that in mind, I have just changed the router settings to use ADSL2 and ADSL2+ only, then rebooted. Sadly, even after a good few minutes, there was no sync at all, I had to add G.DMT again and reboot to get broadband back. I think I will look deeper into the settings menus of the router, maybe I've missed something. (anyone with a BiPAC 7800N who can chip in?).Scuda

Re: Billion BiPac 7800N and ADSL 2+

If you are going to play around with your modem/router's configuration and restart like this repeatedly (and at any time you want to reboot/resync) can I suggest you adopt the following method -Do a Disconnect of your PPP Internet session with the ISP - you need to login to the modem/router interface and look for the Disconnect button to click on. Now wait a few minutes, power down. Then wait 10 minutes (with the line disconnected - during this time alter the modem/router configuration, you can reboot as may times as you like offline to make sure your changes have stuck, also swap any filters, or the modem/router, connect to test socket, etc. - it doesn't matter if you take longer than 10 minutes) and then power up again & connect to the line (You may need to login to the modem/router and click on Connect to re-establish the PPP Internet session). Check the stats immediately (The Noise Margin [SNRM] shown is usually the current Target Noise Margin).I usually recommend you do this no more than 5 times in an hour, and then leave it alone for the rest of the day. Remember the reason for this procedure is to help prevent the exchange DLM from thinking you have a dropping connection with the possible consequences of a raised Target SNRM or a banded connection..You can use the Disconnect/Connect (without a power down) to Gateway hop.